Hello Canadian24!
I don't know the answers of your questions.
Your application is moving very fast.
May I know, what exactly CIC asked you to submit in support of RQ?
You should mail (express or priority) all the available documents plus a letter mentioning reason(s) for delay of the unavailable documents immediately. You must make sure that CIC receives your packet within the 45 days time frame.
Have you considered any possibility of application return for incomplete? Do you recall anything that you didn't do but were supposed to do? Otherwise, I cann't think of any reason.